Julich's bike

Jason Spaceman said:

This year's "must have", ride like da pros, essential piece of

cycling

Quoted message said:

equipment? Elliptical chainrings -->
http://www.cyclingnews.com/tech/2005/probikes/?id=julich_csc_cervelo

;-)

J. "yeah, I know this isn't rec.bicycles.tech but I had to post it
anyways" Spaceman

O.Symmetric rings aren't just "elliptical". Apparently they do
detailed spin scans of your pedal strong to determine the weak points.
They build the ring in such a way that you spin is optimized throughout
the stroke to have more consistent torque throughout the stroke.
Interesting concept - but I'll continue to work on smoothing my
pedalling rather than put those crazy things on.

-a

"Jason Spaceman" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

This year's "must have", ride like da pros, essential piece of cycling
equipment? Elliptical chainrings -->
http://www.cyclingnews.com/tech/2005/probikes/?id=julich_csc_cervelo

;-)

J. "yeah, I know this isn't rec.bicycles.tech but I had to post it
anyways" Spaceman

that chainring will cause a dropped chain, possibly a crash in a sprint-
wait'n'see

Laz

Andrew F Martin said:

O.Symmetric rings aren't just "elliptical". Apparently they do
detailed spin scans of your pedal strong to determine the weak points.
They build the ring in such a way that you spin is optimized throughout
the stroke to have more consistent torque throughout the stroke.

Why would you want more consistent torque?

Quoted message said:

Interesting concept - but I'll continue to work on smoothing my
pedalling rather than put those crazy things on.

Why would you want to work on smoothing your pedaling?

Why would that be?

Andrew

Laz said:

that chainring will cause a dropped chain, possibly a crash in a sprint-
wait'n'see

Maybe so - the CSC mechanics hate them .... adjusting the front mech is
a pain. Chain drop is appearantly a problem.

AndersB

"Robert Chung" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Andrew F Martin said:

O.Symmetric rings aren't just "elliptical". Apparently they do
detailed spin scans of your pedal strong to determine the weak points.
They build the ring in such a way that you spin is optimized throughout
the stroke to have more consistent torque throughout the stroke.

Why would you want more consistent torque?

He mis-stated - the rings are designed to change the ratios slightly to
acount for the different torque at different parts of your pedal stroke. And
they can't work very well because the stroke torque changes are great deal
more than they can compensate for. And they feel funny.